Have you over torqued the double tapped thread on a 3D or 3D24 Non drive side crank arm?
Don't worry, we can refurbish that. Price includes drilling out the insert and replacing the DTT bolt and insert with a new unit.
This is not possible without the ROTOR Factory tool.
Purchase this product and post your non drive side arm in, we will do the work and post back out to you. Turnaround time is normally 2-3 days max.